01-31-2024, 11:39 PM | #1 |
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Hi, guys. I have a 2015 bmw m235ix with full boltons.
Catless downpipe BMS intercooler BMS Chargepipe Resonator delete It also came with a jb4 but I’m not sure what map to put it on. With the boltons, I can run a stage 2, but I don’t have access to 93octane. Can I just run map 2 with 92 octane? Or just mix it with E85? |
02-02-2024, 11:42 AM | #2 |
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If you are only using 92 octane, use map 1 or 5
if you mix E85, you can use map 2 or map 5 Map Info (selected via menu 0 in dash or using JB4 Mobile/laptop interface. Map1 is the default map) Map 0: JB4 disabled Map 1: Additive target, around 4psi over stock. Map 2: Additive target, around 6psi over stock. Suggested for those with 93 octane and bolt on modifications. Also good for small E85 mixtures. Map 3: Progressive WMI mapping. Map 4: Stock performance with JB4 active for logging only. Map 5: Autotuning map, absolute target of 11-17psi based on octane and conditions. Map 6: User definable absolute target map. Suggested for troubleshooting by professionals only. Map 7: Race gas map. Absolute target of 18.5psi. Requires straight unleaded race gas. E85 Use Up to 30% E85 mixtures can be used in most situations. M2 Specific Map Settings The M2 runs much higher boost from the factory than a normal N55 motor and thus often requires special settings. Ensure you have v13 firmware or higher, Set FutureUseD bit6 on (as if you had a back end flash map), and then we suggest starting with map2.
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02-02-2024, 01:18 PM | #3 |
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Thank you for the detailed reply. I’ve read that for map 2 I need to mix around 2-3 gallons of E85 for a full tank of 92. Does that sound about right? Someone else told me I need to fill half tank 92 and the other half with E85
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02-03-2024, 12:17 PM | #4 | |
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Quote:
I don't recommend going as high as 50/50. here is how the math works. lets stay total capacity of the car is 14 gallons 7 * .85 = 5.95 7* .1 (regular fuel as up to 10% ethanol) - .7 (5.95+ .7) / 14 = 0.475 = E47 Thats a bit too high for what you are trying to do. for your application, i would keep the mix at E30
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02-04-2024, 01:40 PM | #6 |
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Not mandatory, but its a nice upgrade to have for a small bump in power and big bump in sound.
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02-04-2024, 05:38 PM | #7 |
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You don't have a intercooler?
I would definitely get one. The install is super easy and will make more power than any other mod for the price. https://mad-us.com/mad-bmw-5-stepped...55-1-2-3-4-m2/
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